Primary frequency modulation dynamic cooperative control method of turbine regulating system

Abstract

The invention relates to a primary frequency modulation dynamic cooperative control method of a steam turbine regulating system, and the method is characterized in that the method comprises the steps:combining a condensate pump frequency conversion throttling technology and a frequency modulation step technology, recycling or releasing a part of steam medium for low-pressure heater heat exchangein cooperative control, adding a frequency modulation step outside a primary frequency modulation dead zone of a unit, and carrying out a thermal state test; capturing performance curves of condensedwater throttling and frequency modulation steps under different working conditions, and performing mathematical modeling on a frequency modulation device; during unit operation, according to the mathematical model, evaluating the frequency modulation capacity of condensation water throttling and frequency modulation under various working conditions in real time, and performing distribution in advance in combination with safety and economic indexes; during primary frequency modulation action, according to the distribution coefficient, enabling all the adjusting systems to act in real time in acoordinated mode, considering unit safety and energy consumption indexes, and adjusting the adjusting depth in a coordinated mode. Throttling loss can be reduced to the maximum extent, a frequency modulation step is added outside a primary frequency modulation dead zone, unit safety and energy consumption can be considered, and it is ensured that the unit frequency modulation performance meets therequirement.

Description

technical field [0001] The invention relates to the field of steam turbine regulation systems, in particular to a primary frequency modulation dynamic cooperative control method of the steam turbine regulation system. Background technique [0002] As a common problem of steam inlet and throttling steam distribution units, it is difficult to balance the thermal efficiency of the unit and the performance of primary frequency regulation. In recent years, the network commissioning has attached great importance to the performance of primary frequency regulation of power plants, and determined the overall goal of a pass rate of primary frequency regulation of 75%. Conventional primary frequency modulation technology is difficult to meet the requirements, and new technologies are constantly innovating, such as: [0003] Existing optimization technology for condensate throttling. CN201811279258.4 provides an auxiliary control system and method for primary frequency regulation of a ...

AI Technical Summary

Problems solved by technology

[0002] As a common problem of steam inlet and throttling steam distribution units, it is difficult to balance the thermal efficiency of the unit and the performance of primary frequency regulation. In recent years, network commissioning has attached great importance to the performance of primary frequency regulation of power plants, and determined the overall goal of a pass rate of primary frequency regulation of 75%. Conventional primary frequency modulation technology is difficult to meet the requirements, and new technologies are constantly innovating, such as:

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